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Discussion Starter #1 (Edited)
Here's a good one...
My 2008 Cobalt power window fuse frequently blows when someone (large) sits in the passenger seat. Windows are NOT in use when it happens.
I assume this has something to do with the air bag or seat belt sensors. The passenger air bag activated light comes on so I assume that is working... I think it is the same for the seat belt reminder chime.
I'm guessing the short is not under the seat...
Anybody have any suggestions before I waste money at a dealership???
thanks.................
 

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Wow, that's a good one. Unless when you say large you mean large enough that he would be leaning on the door panel and maybe pinching a wire in the door panel.
 

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Discussion Starter #3
Nope... has nothing to do with the door.
If anyone has a good schematic of the wiring under the seat, I'd like to see it. I would disconnect everything except the actual airbag.
Thanks for the reply.
 

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It must have something to do with the door, because none of the wiring under the seat has anything to do with power windows. Passenger presence module in the 2008 and heated seat module if you have heated seats.
 

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Discussion Starter #5
going through fuses

Thanks for your reply...
but it blew another one today... same story. I would think it isn't under the seat but in the console. When someone sits in the passenger seat the charge through the sensor system must cause a short in the fuse box or maybe bare wires touching etc.
There are two wiring harnesses under the seat. When I disconnected one the Service Air Bag light came on. The other harness controlled the air bag and seat belt warning light. I didn't have any more good fuses so I couldn't test to see which is responsible. I may have to pull the seat for a good look.
Thanks again... i'll keep trying.
 

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Never say "waste money at a dealership". No dealership is interested in whats in your wallet. Their concern is to address you any preventative maintenance to give you longevity of owning the vehicle. You may think they are trying to rob you out of money, but any shop you go to that's well known, labor rate is $100/hr. I say might as well get to the dealer, knowing that they will warranty their repair and knowing that the technicians are certified to work on your GM vehicle.

Your issue has an electrical problem as Coby and I can tell :) I wouldn't say weight has an issue for the short, but it causes the short to occur. The passenger air bag module does not activate until the seat has recorded at least 30 lbs to see a person is present.

Do not fool with the SAS equipment without removing the battery source for at least 10 minutes. For your fuse blowing everytime, are you using the same amp rating fuse? Do NOT use a higher amp rating fuse, thinking that will solve the problem. You have what technicans call a short to ground circuit. Meaning as soon as you complete the circuit with a fuse, it overloads and pops the fuse. If you do not know what your doing, you may cause wires to melt and you "will" have to take it in to the dealership for soldering of a new circuit, and that's $$$ for labor.

Not trying to procrastinate you or belittle you, just that you should not attempt electrical repairs if you have no understanding to save you trouble and frustration. Yet alone, let one simple repair turn into a nightmare with a whole new air bag module and that's $$$ plus a report on that vehicle to the DMV and carfax that a new air bag module with BCM was replaced. That's not good at all to see that happen. It really reduces the value on the vehicle.

After all of this, have you at least looked at the power window relay? If its stuck on the single throw all the time, it stays on "all the time" and that would be my starting point if you were a customer at a dealership. I would check the battery first, then check the relay.
 

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There is a harness that runs along the inside of the console passenger side. I believe it carries power to the rear passenger door for power door looks and windows.

Maybe remove top console cover and have a look in there for freyed wires. Move the harness a little to see if it improves.
 

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that's gotta be embarrassing.
" Hey, what's your weight? "
" um... you're going to have to ride in the back seat. "
 
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